Aaron Parecki

/* add http:// to URL fields on blur */
  document.addEventListener('DOMContentLoaded', function() {
    var elements = document.querySelectorAll("input[type=url]");
    Array.prototype.forEach.call(elements, function(el, i){
      el.addEventListener("blur", function(e){
        if(e.target.value.match(/^(?!https?:).+\..+/)) {
          e.target.value = "http://"+e.target.value;
        }
      });
    });
  });